Comparison
letta vs cognee
Verdict
Pick letta if letta is a Python-based platform designed to foster the development of stateful AI agents with capabilities for advanced memory techniques that support continuous learning and self-improvement. The Apache-2.0 license it鳧; pick cognee if when evaluating Cognee, consider its self-hosted persistence capability and the extensive support it offers through multiple programming languages (Python, Rust, TypeScript). It uses vector.
Markdown twin · letta alternatives · cognee alternatives
GraphCanon updated Sep 20, 2026
10views this month
Trust & integrity
| Signal | letta | cognee |
|---|---|---|
| Maintenance | Very active (0d since push) As of Aug 17, 2026 · github_public_v1 | Very active (0d since push) As of Sep 20, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Aug 17, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 20, 2026 · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of Jul 11, 2026 · osv@v1 | No lockfile (source not queried) As of Jul 11, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- letta
- Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.
- cognee
- Cognee is the open-source AI memory platform for agents.
Stars
- letta
- 24k
- cognee
- 31k
Forks
- letta
- 2.6k
- cognee
- 3.1k
Open issues
- letta
- 41
- cognee
- 482
Language
- letta
- -
- cognee
- Python
Adopt for
- letta
- letta is a Python-based platform designed to foster the development of stateful AI agents with capabilities for advanced memory techniques that support continuous learning and self-improvement. The Apache-2.0 license it鳧
- cognee
- When evaluating Cognee, consider its self-hosted persistence capability and the extensive support it offers through multiple programming languages (Python, Rust, TypeScript). It uses vector databases to provide efficient
Persona
- letta
- -
- cognee
- -
Runtime
- letta
- -
- cognee
- -
License
- letta
- letta operates under the Apache-2.0 license.
- cognee
- Apache-2.0
Last pushed
- letta
- Aug 16, 2026
- cognee
- Sep 19, 2026
Categories
- letta
- AI Agents
- cognee
- AI Agents, Vector Databases
Trust and health
Open issues (now)
- letta
- 41
- cognee
- 482
Stars delta
- letta
- +443 (30d)
- cognee
- +729 (30d)
Open issues delta
- letta
- -8 (30d)
- cognee
- +123 (30d)
Full report
- letta
- Trust report
- cognee
- Trust report
Choose letta if…
- Tags unique to letta: advanced memory, agents development framework, self-improving ai, stateful ai.
- When you require an AI agent with robust memory features that enable continuous learning and adaptation over time.
- Leaner open-issue backlog (41).
When NOT to use letta
- If you are looking for a simple stateless AI solution without advanced memory capabilities, as letta is geared towards more complex stateful agent development.
- When your project's requirements involve strict limitations around data retention and privacy where even anonymized interaction logs might be considered sensitive.
Choose cognee if…
- Tags unique to cognee: agent-memory, ai-agents, docker, knowledge-graph.
- Also covers Vector Databases.
- cognee ships Docker support for self-hosted deployment.
- - You are developing AI agents that require persistent long-term memory across different sessions.
When NOT to use cognee
- - Your project does not require persistent memory storage, or your agents operate fully within short-lived sessions without the need for past context.
- - You are aiming for minimal setup overhead and prefer a cloud-based solution that requires less maintenance on your infrastructure side.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (letta-ai/letta) · observed Sep 20, 2026
- GitHub forks (letta-ai/letta) · observed Sep 20, 2026
- Last push (letta-ai/letta) · observed Aug 16, 2026
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (topoteretes/cognee) · observed Sep 20, 2026
- GitHub forks (topoteretes/cognee) · observed Sep 20, 2026
- Last push (topoteretes/cognee) · observed Sep 19, 2026
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: letta 24k · cognee 31k (synced Sep 20, 2026).
Common questions
- What is the difference between letta and cognee?
- letta: Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.. cognee: Cognee is the open-source AI memory platform for agents.. See the comparison table for live GitHub stats and shared categories.
- When should I choose letta over cognee?
- Choose letta over cognee when Tags unique to letta: advanced memory, agents development framework, self-improving ai, stateful ai; When you require an AI agent with robust memory features that enable continuous learning and adaptation over time; Leaner open-issue backlog (41).
- When should I choose cognee over letta?
- Choose cognee over letta when Tags unique to cognee: agent-memory, ai-agents, docker, knowledge-graph; Also covers Vector Databases; cognee ships Docker support for self-hosted deployment; - You are developing AI agents that require persistent long-term memory across different sessions.
- When should I avoid letta?
- If you are looking for a simple stateless AI solution without advanced memory capabilities, as letta is geared towards more complex stateful agent development. When your project's requirements involve strict limitations around data retention and privacy where even anonymized interaction logs might be considered sensitive.
- When should I avoid cognee?
- - Your project does not require persistent memory storage, or your agents operate fully within short-lived sessions without the need for past context. - You are aiming for minimal setup overhead and prefer a cloud-based solution that requires less maintenance on your infrastructure side.
- Is letta or cognee more popular on GitHub?
- cognee has more GitHub stars (30,850 vs 24,274). Stars measure visibility, not whether either tool fits your constraints.
- Are letta and cognee open source?
- Yes - both are open-source projects on GitHub (letta: Apache-2.0, cognee: Apache-2.0).
- Where can I find alternatives to letta or cognee?
- GraphCanon lists graph-backed alternatives at letta alternatives and cognee alternatives (letta markdown twin, cognee markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, letta or cognee?
- letta: Very active. cognee: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for letta and cognee?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: letta trust report; cognee trust report.